When is a permit needed for aeration?

Aeration Systems – Summer Rules

Aeration systems that will be installed such that components rest on the bed of the waterway require a Ch. 30 miscellaneous structures individual permit. Individual permits require an additional 30 day public notice period, and have the potential for a public hearing to be requested. For information on applying, visit: WDNR Individual Permit Checklist.

If the aeration system is floating, is attached to a structure (such as a pier) does not have any component resting on the lake bottom, and is only pushing away floating materials, then a Ch. 30 permit is not required.

If the aeration system is installed in such a way that it is blowing around/disturbing more than 2 cubic yards of lake bottom (sediment), then a dredging permit would actually be necessary.